package com.sanyue.codingsettlement.controller;

import cn.hutool.json.JSONUtil;
import com.sanyue.codingsettlement.annotation.AuthCheck;
import com.sanyue.codingsettlement.common.BaseResponse;
import com.sanyue.codingsettlement.common.DeleteRequest;
import com.sanyue.codingsettlement.common.ErrorCode;
import com.sanyue.codingsettlement.common.ResultUtils;
import com.sanyue.codingsettlement.constant.UserConstant;
import com.sanyue.codingsettlement.exception.BusinessException;
import com.sanyue.codingsettlement.exception.ThrowUtils;
import com.sanyue.codingsettlement.manager.AiManager;
import com.sanyue.codingsettlement.manager.RedisLimiterManager;
import com.sanyue.codingsettlement.model.dto.question.*;
import com.sanyue.codingsettlement.model.entity.App;
import com.sanyue.codingsettlement.model.entity.Question;
import com.sanyue.codingsettlement.model.entity.User;
import com.sanyue.codingsettlement.model.enums.AppTypeStatusEnum;
import com.sanyue.codingsettlement.model.vo.QuestionVO;
import com.sanyue.codingsettlement.service.AppService;
import com.sanyue.codingsettlement.service.QuestionService;
import com.sanyue.codingsettlement.service.UserService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import java.util.List;

/**
 * 题目表接口
 *
 * @author <a href="https://github.com/liyupi">程序员鱼皮</a>
 * @from <a href="https://www.code-nav.cn">编程导航学习圈</a>
 */
@RestController
@RequestMapping("/question")
@Slf4j
public class QuestionController {

    @Resource
    private QuestionService questionService;

    @Resource
    private UserService userService;

    @Resource
    private AppService appService;

    @Resource
    private AiManager aiManager;

    @Resource
    private RedisLimiterManager redisLimiterManager;

    // region 增删改查

    /**
     * 创建题目表
     *
     * @param questionAddRequest
     * @param request
     * @return
     */
    @PostMapping("/add")
    public BaseResponse<Long> addQuestion(@RequestBody QuestionAddRequest questionAddRequest, HttpServletRequest request) {
        ThrowUtils.throwIf(questionAddRequest == null, ErrorCode.PARAMS_ERROR);
        // todo 在此处将实体类和 DTO 进行转换
        Question question = new Question();
        BeanUtils.copyProperties(questionAddRequest, question);
        List<QuestionContent> questionContentList = questionAddRequest.getQuestionContentList();
        if (questionContentList != null) {
            question.setQuestionContent(JSONUtil.toJsonStr(questionContentList));
        }
        // 数据校验
        questionService.validQuestion(question, true);
        // todo 填充默认值
        User loginUser = userService.getLoginUser(request);
        question.setUserId(loginUser.getId());

        //应用存在，题目才可以创建
        Long appId = questionAddRequest.getAppId();
        App app = appService.getById(appId);
        ThrowUtils.throwIf(app == null, ErrorCode.PARAMS_ERROR,"应用不存在");

        // 写入数据库
        boolean result = questionService.save(question);
        ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
        // 返回新写入的数据 id
        long newQuestionId = question.getId();
        return ResultUtils.success(newQuestionId);
    }

    /**
     * 删除题目表
     *
     * @param deleteRequest
     * @param request
     * @return
     */
    @PostMapping("/delete")
    public BaseResponse<Boolean> deleteQuestion(@RequestBody DeleteRequest deleteRequest, HttpServletRequest request) {
        if (deleteRequest == null || deleteRequest.getId() <= 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        User user = userService.getLoginUser(request);
        long id = deleteRequest.getId();
        // 判断是否存在
        Question oldQuestion = questionService.getById(id);
        ThrowUtils.throwIf(oldQuestion == null, ErrorCode.NOT_FOUND_ERROR);
        // 仅本人或管理员可删除
        if (!oldQuestion.getUserId().equals(user.getId()) && !userService.isAdmin(request)) {
            throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
        }
        // 操作数据库
        boolean result = questionService.removeById(id);
        ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
        return ResultUtils.success(true);
    }

    /**
     * 更新题目表（仅管理员可用）
     *
     * @param questionUpdateRequest
     * @return
     */
    @PostMapping("/update")
    @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
    public BaseResponse<Boolean> updateQuestion(@RequestBody QuestionUpdateRequest questionUpdateRequest) {
        if (questionUpdateRequest == null || questionUpdateRequest.getId() <= 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        // todo 在此处将实体类和 DTO 进行转换
        Question question = new Question();
        BeanUtils.copyProperties(questionUpdateRequest, question);
        List<QuestionContent> questionContentList = questionUpdateRequest.getQuestionContentList();
        if (questionContentList != null) {
            question.setQuestionContent(JSONUtil.toJsonStr(questionContentList));
        }
        // 数据校验
        questionService.validQuestion(question, false);
        // 判断是否存在
        long id = questionUpdateRequest.getId();
        Question oldQuestion = questionService.getById(id);
        ThrowUtils.throwIf(oldQuestion == null, ErrorCode.NOT_FOUND_ERROR);
        // 操作数据库
        boolean result = questionService.updateById(question);
        ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
        return ResultUtils.success(true);
    }

    /**
     * 根据 id 获取题目表（封装类）
     *
     * @param id
     * @return
     */
    @GetMapping("/get/vo")
    public BaseResponse<QuestionVO> getQuestionVOById(long id, HttpServletRequest request) {
        ThrowUtils.throwIf(id <= 0, ErrorCode.PARAMS_ERROR);
        // 查询数据库
        Question question = questionService.getById(id);
        ThrowUtils.throwIf(question == null, ErrorCode.NOT_FOUND_ERROR);
        // 获取封装类
        return ResultUtils.success(questionService.getQuestionVO(question, request));
    }

    // /**
    //  * 分页获取题目表列表（仅管理员可用）
    //  *
    //  * @param questionQueryRequest
    //  * @return
    //  */
    // @PostMapping("/list/page")
    // @AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
    // public BaseResponse<Page<Question>> listQuestionByPage(@RequestBody QuestionQueryRequest questionQueryRequest) {
    //     long current = questionQueryRequest.getCurrent();
    //     long size = questionQueryRequest.getPageSize();
    //     // 查询数据库
    //     Page<Question> questionPage = questionService.page(new Page<>(current, size),
    //             questionService.getQueryWrapper(questionQueryRequest));
    //     return ResultUtils.success(questionPage);
    // }

    // /**
    //  * 分页获取题目表列表（封装类）
    //  *
    //  * @param questionQueryRequest
    //  * @param request
    //  * @return
    //  */
    // @PostMapping("/list/page/vo")
    // public BaseResponse<Page<QuestionVO>> listQuestionVOByPage(@RequestBody QuestionQueryRequest questionQueryRequest,
    //                                                            HttpServletRequest request) {
    //     long current = questionQueryRequest.getCurrent();
    //     long size = questionQueryRequest.getPageSize();
    //     // 限制爬虫
    //     ThrowUtils.throwIf(size > 20, ErrorCode.PARAMS_ERROR);
    //     // 查询数据库
    //     Page<Question> questionPage = questionService.page(new Page<>(current, size),
    //             questionService.getQueryWrapper(questionQueryRequest));
    //     // 获取封装类
    //     return ResultUtils.success(questionService.getQuestionVOPage(questionPage, request));
    // }

    // /**
    //  * 分页获取当前登录用户创建的题目表列表
    //  *
    //  * @param questionQueryRequest
    //  * @param request
    //  * @return
    //  */
    // @PostMapping("/my/list/page/vo")
    // public BaseResponse<Page<QuestionVO>> listMyQuestionVOByPage(@RequestBody QuestionQueryRequest questionQueryRequest,
    //                                                              HttpServletRequest request) {
    //     ThrowUtils.throwIf(questionQueryRequest == null, ErrorCode.PARAMS_ERROR);
    //     // 补充查询条件，只查询当前登录用户的数据
    //     User loginUser = userService.getLoginUser(request);
    //     questionQueryRequest.setUserId(loginUser.getId());
    //     long current = questionQueryRequest.getCurrent();
    //     long size = questionQueryRequest.getPageSize();
    //     // 限制爬虫
    //     ThrowUtils.throwIf(size > 20, ErrorCode.PARAMS_ERROR);
    //     // 查询数据库
    //     Page<Question> questionPage = questionService.page(new Page<>(current, size),
    //             questionService.getQueryWrapper(questionQueryRequest));
    //     // 获取封装类
    //     return ResultUtils.success(questionService.getQuestionVOPage(questionPage, request));
    // }

    /**
     * 编辑题目表（给用户使用）
     *
     * @param questionEditRequest
     * @param request
     * @return
     */
    @PostMapping("/edit")
    public BaseResponse<Boolean> editQuestion(@RequestBody QuestionEditRequest questionEditRequest, HttpServletRequest request) {
        if (questionEditRequest == null || questionEditRequest.getId() <= 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        // todo 在此处将实体类和 DTO 进行转换
        Question question = new Question();
        BeanUtils.copyProperties(questionEditRequest, question);
        List<QuestionContent> questionContentList = questionEditRequest.getQuestionContentList();
        if (questionContentList != null) {
            question.setQuestionContent(JSONUtil.toJsonStr(questionContentList));
        }
        // 数据校验
        questionService.validQuestion(question, false);
        User loginUser = userService.getLoginUser(request);
        // 判断是否存在
        long id = questionEditRequest.getId();
        Question oldQuestion = questionService.getById(id);
        ThrowUtils.throwIf(oldQuestion == null, ErrorCode.NOT_FOUND_ERROR);
        // 仅本人或管理员可编辑
        if (!oldQuestion.getUserId().equals(loginUser.getId()) && !userService.isAdmin(loginUser)) {
            throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
        }
        // 操作数据库
        boolean result = questionService.updateById(question);
        ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
        return ResultUtils.success(true);
    }

    /**
     * 创建题目表
     *
     * @param genQuestionByAiRequest
     * @param request
     * @return
     */
    @PostMapping("/ai_generator")
    public BaseResponse<List<QuestionContent>> genQuestionByAi(@RequestBody GenQuestionByAiRequest genQuestionByAiRequest, HttpServletRequest request) {
        ThrowUtils.throwIf(genQuestionByAiRequest == null, ErrorCode.PARAMS_ERROR);
        Integer questionNumber = genQuestionByAiRequest.getQuestionNumber();
        Integer optionNumber = genQuestionByAiRequest.getOptionNumber();
        Long appId = genQuestionByAiRequest.getAppId();
        if(questionNumber == null || optionNumber == null){
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        if(questionNumber == 0 || optionNumber == 0){
            return ResultUtils.success(null);
        }
        App app = appService.getById(appId);
        if(app == null){
            throw new BusinessException(ErrorCode.PARAMS_ERROR);
        }
        //限流，ai相关功能一天只能使用10次
        User loginUser = userService.getLoginUser(request);
        redisLimiterManager.doLimit(loginUser.getId());
        //调用ai 生成题目
        String userMessage = getUserMessage(app,questionNumber,optionNumber);
        String aiResponse = aiManager.getQuestionByAiResponse(userMessage);
        String questionStr = getResultMessage(aiResponse);
        System.out.println("questionStr = " + questionStr);
        List<QuestionContent> questionContentList = JSONUtil.toList(questionStr, QuestionContent.class);
        return ResultUtils.success(questionContentList);
    }


    /**
     * 封装用户输入信息
     * @param app
     * @param questionNumber
     * @param optionNumber
     * @return
     */
    private String getUserMessage(App app, Integer questionNumber, Integer optionNumber){
        String appDesc = app.getAppDesc();
        String appName = app.getAppName();
        Integer appType = app.getAppType();
        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append(appName).append(",").append("\n");
        stringBuilder.append("【【【").append(appDesc).append("】】】").append(",").append("\n");
        stringBuilder.append(AppTypeStatusEnum.getEnumByValue(appType).getText()).append(",").append("\n");
        stringBuilder.append(questionNumber).append(",").append("\n");
        stringBuilder.append(optionNumber);
        return stringBuilder.toString();
    }


    /**
     * 封装ai返回值
     * @param aiResponse
     * @return
     */
    private String getResultMessage(String aiResponse){
        //去掉首尾 []
        int start = aiResponse.indexOf("[");
        int end = aiResponse.lastIndexOf("]");
        return aiResponse.substring(start,end + 1);
    }



    // endregion
}
